Re: Is this thread-safe?

From:
Scot T Brennecke <ScotB@Spamhater.MVPs.org>
Newsgroups:
microsoft.public.vc.language
Date:
Sun, 02 Aug 2009 03:33:03 -0500
Message-ID:
<OFUtav0EKHA.4704@TK2MSFTNGP04.phx.gbl>
"crashes" is such an overused and ambiguous term. Please explain what it really looks like to "crash" in that function. What
thread activity leads you to believe that this is a question of thread safety? I don't see any attempts in your code to ensure
thread safety, so I'd say it isn't. But you haven't explained why you think multi-threading is relevant to the problem.

Jack wrote:

Hi guys

[code]
unsigned int __stdcall cDisplay_Thread::Manage_Display(void *arg)
{
  OutputDebugString("CDisplay_Thread::Manage_Display\n");
 CDemoView *v = (CDemoView*) arg;

 while(true)
 {
  if (v->GetDocument()->m_strRecv.GetLength() != 0)
  {

   v->UpdateData(FALSE);

  }
 }
   return 0;

}
[/code]

Is this code snippet above thread safe?
This crashes on v->UpdateData(FALSE); (Doing DataExchange)
v is CFormView
The GetDocument function above it just works fine..
I tried to declare a member variable in cDisplay_Thread::Manage_Display, but
I can't keep it persistant.... Any comments?
Thanks
Jack

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